Head lamp with LCD photovalve for automobile

Abstract

The present invention discloses an automobile headlamp with an LCD light valve, comprising an LED light source (4), a reflector (3) and a convex (1). The convex (1) is connected with the reflector (4) to form a reflection and refraction system. The invention is characterized in that: the reflector (3) is an elliptical sphere; the LED light source (4) is fixed on a focus of the elliptical sphere, and a second focus of the elliptical sphere is coincided with the focus of the convex (1); the LCD light valve (2) is arranged on the front of the LED light source (4); the LCD light valve (2) is fixed on the reflector (3), and is connected with a power source via a conducting wire. The light source of the automobile headlamp has small volume. With the LCD light valve, the headlamp is capable of conveniently realizing the switching between far light and close light.

Description

technical field [0001] The invention relates to an automobile headlamp with an LCD light valve, which belongs to the field of automobile lamps. Background technique [0002] Traditional car headlights use incandescent lamps, halogen lamps, discharge lamps, etc. as light sources. When they are lit, the temperature in the lamp cavity is very high, about 130 ° C ~ 160 ° C, so the low beam baffle is generally selected High temperature resistant metal material. The disadvantage of this kind of headlight is that the light source is bulky, it is not convenient for the layout and design of various equipment, and the power consumption is relatively large. The LED light source has low calorific value, no heat radiation, cold light source, and the LED components are small in size, which is more convenient for the layout and design of various equipment. The LCD light valve (that is, the liquid crystal light valve) is not resistant to high temperature, and the maximum working temperatu...

AI Technical Summary

Problems solved by technology

If a metal material is used as the baffle, two systems of low beam and high beam are generally required. If the high and low beam are required to be in the same system, a motor must be used to mechanically rotate the baffle, which requires a relatively large space for the lamp cavity, and The shock resistance of the mechanical system of the motor rotation cannot be guaranteed. In addition, the metal baffle will also generate electromagnetic interference.

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